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Kw Dump truck and 1673 Cat
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ditchman24 View Drop Down
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Joined: 22 Jun 2017
Location: Watkins Iowa
Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Topic: Kw Dump truck and 1673 Cat
    Posted: 08 May 2022 at 3:32pm
I am looking for some information on a 1673 Caterpillar motor that is in our old dump truck. I have been wanting to get it up and running again but have had little success. It ran when parked. (20 some years ago)
It turns over and will fire with a snort of either but won’t run on it own power. I have found little to no information on the internet on the 1673 motor. I do have a service manual for it but am striking out on making it run.
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shameless dude View Drop Down
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Joined: 10 Apr 2017
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Points: 13607 		Post Options Post Options   Thanks (0) Thanks(0)   Quote shameless dude Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2022 at 6:28pm
prolly get more info over on the construction part of this forum!
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Joined: 14 Sep 2009
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Points: 33693 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2022 at 6:53pm
Most likely lost seals in the transfer pump and is not drawing fuel
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Joined: 22 Jun 2017
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2022 at 8:22pm
I am having trouble getting pressure out of the main pump. Not sure if it has a manual shut off as well as an electric run/ stop. It’s been too long since I ran it to remember.
Injection cups are cleaned and have a good spray pattern. No real decent pressure at the injectors though.
On the old dozers dose the throttle pedal have to be out to run or pressed in? What was kill on them?
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8570 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2022 at 11:14pm
On D6B-C-D you pulled throttle fully back past idle to kill. My 3406 had ele solinoid which pushed in down low in rear of pump to pull rack back through pivoting to kill. No power-no start. Solinoid failed mid day and shut me down in middle of town. Removed it and borrowed hacksaw from city worker and cut pushrod off. Reinstalled to finish day. Put in high gear to kill it. Got new one as soon as possible.
Like Dave,bet it's transfer pump or farther back. Pull "out" line off pump and crank to see if it's pumping fuel. Does the injection pump have the plate up front on the side? Can remove and see if rack is moving fwd to full fuel. It could just be "stuck" alittle. If it's got it,can pry gently in notch to see if it'll move. Could have a plunger sticking and not letting rack move. BE CAREFULL!
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Joined: 12 Sep 2009
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Points: 8570 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2022 at 11:17pm
Originally posted by ditchman24 ditchman24 wrote:

I am having trouble getting pressure out of the main pump. Not sure if it has a manual shut off as well as an electric run/ stop. It’s been too long since I ran it to remember.
Injection cups are cleaned and have a good spray pattern. No real decent pressure at the injectors though.
On the old dozers dose the throttle pedal have to be out to run or pressed in? What was kill on them?
Pull electric shut off off and see if it's working.
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ditchman24 View Drop Down
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Joined: 22 Jun 2017
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2022 at 11:32pm
Electric shut off is working. Will have to look into it more to see if the rack is stuck. I do have good fuel to the pump. No leaks. Fixed that last fall.
Thanks for the help this far.
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
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Points: 8570 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 09 May 2022 at 9:30am
Ok not likely but beware if a plunger gets  a minor corrosion from non use it is possible to score the barrel and cause the  plunger to not be able to turn (which controls fuel delivery) so you could end up with a situation where rack sticks in FULL FUEL !!!! I would want to know I had control of the rack before it runs.
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ditchman24 View Drop Down
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Joined: 22 Jun 2017
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2022 at 10:11pm
Thanks for the advise. Going to have to round up some tools and see what this pump is/isn't doing.
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shameless dude View Drop Down
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Joined: 10 Apr 2017
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Points: 13607 		Post Options Post Options   Thanks (0) Thanks(0)   Quote shameless dude Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2022 at 10:13pm
would an external fuel pump work on this? 
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Joined: 12 Sep 2009
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Points: 8570 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2022 at 10:16pm
I see on the data plate "rack setting" so I'm sure it's got the diamond shaped plate on the side. That's where you attach the rack travel gage.

Edited by SteveM C/IL - 10 May 2022 at 10:17pm
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Ray54 View Drop Down
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Joined: 22 Nov 2009
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Points: 4713 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray54 Quote  Post ReplyReply Direct Link To This Post Posted: 10 May 2022 at 10:45pm
I would guess the new cleaner diesel is most of the problem.  Would not surprise me if you need internals of injection pump cleaned/freed up. Not oily like old diesel that parts don't stick in the pump.  
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Joined: 22 Jun 2017
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2022 at 8:39pm
Finding the rack gauge seems to be almost impossible. Unless I am missing something. Gives a part no. 1-8M530. Also checked the bypass out and it seems to be seated and clean. Still crank but no injection pressure.
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ditchman24 View Drop Down
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2022 at 8:40pm
Shameless. What do you mean by external pump?
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SteveM C/IL View Drop Down
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Joined: 12 Sep 2009
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Points: 8570 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 12 May 2022 at 7:52am
You don't need a rack gage just be able to see the rack. Can't see that area in your picture. Trying to find pic on the net.Found a grader engine(1673) and looks like maybe a hex plug on front is where the rack is...poor picture. There should be fuel in and fuel out lines for fuel manifold of pump and it has to have fuel in it for the plungers to draw from.
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Joined: 15 Sep 2009
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Points: 2515 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DonDittmar Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2022 at 5:58am
If you would shoot me the last 6 of the VIN is I can run it in the system and see exactly what we are working with
Experience is a fancy name for past mistakes. "Great moments are born from great opportunity"

1968 D15D,1962 D19D
Also 1965 Cub Loboy and 1958 JD 720 Diesel Pony Start
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shameless dude View Drop Down
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Joined: 10 Apr 2017
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Points: 13607 		Post Options Post Options   Thanks (0) Thanks(0)   Quote shameless dude Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2022 at 7:09am
Ditch...i'm asking if like an electric pump can be installed back before the injection pump to keep pressure on the injection pump?
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ditchman24 View Drop Down
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Joined: 22 Jun 2017
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2022 at 12:30pm

Engine plate
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ditchman24 View Drop Down
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Couple more of engine
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DMiller View Drop Down
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Joined: 14 Sep 2009
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Points: 33693 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 13 May 2022 at 6:03pm
The fuel transfer pumps on these are like a small hydraulic pump, but HUGE for handling Fuel, a electric pump will not deliver enough volume.
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shameless dude View Drop Down
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Points: 13607 		Post Options Post Options   Thanks (0) Thanks(0)   Quote shameless dude Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2022 at 1:14am
o-k...just a suggestion...thanks
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DMiller View Drop Down
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Joined: 14 Sep 2009
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Points: 33693 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2022 at 6:11am
Main aspect on the rack in the injection pump is to make sure it moves at all, remove access point cover, determine where the rack end is with a depth test, screwdriver, small punch whatever, if was in STOP then take to run, that rack HAS TO move to full fuel position to just start that engine.  No movement will not ever start.  As for the Transfer Pump, the supply/return checks are on the filter housing and return port of pump and may appear clean but can still be locked up, these should be disassembled and cleaned then put back on if the rack does move.  A bad fuel line tank to transfer pump can block fuel flow or leak enough air to not ever pull fuel.

Edited by DMiller - 14 May 2022 at 6:12am
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Joined: 12 Sep 2009
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Points: 8570 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 14 May 2022 at 10:09am
When you say "good fuel to the pump" does that mean from transfer to injection pump? When all is well you should be able to disconnect the return line from injection pump and have fuel flowing out  when cranking engine. Starter speed will not be will not be pushing fuel like a fire hose but should be pushing steady flow. Mechanical Cat fuel systems don't have a large amount of return fuel. If transfer pump is pushing fuel through injection pump fuel manifold and out return fitting you should have everything you need to run. In that case your rack must not be traveling to full fuel. Even at full fuel,they don't flow a large amount out the injector line when you "crack" a line at pump or injector. Whether Cat or Bosch the rack goes to full fuel to start and the govenor  quickly pulls it back at start up. So what is the situation?
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darrel in ND View Drop Down
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I'm not much help, but sweet ole KW ‼️
Darrel
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 16 May 2022 at 9:15pm
Thanks for the help everyone. Haven't had any time to work on it lately, most likely won't unit we get pushed out of the fields.
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Points: 106 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ditchman24 Quote  Post ReplyReply Direct Link To This Post Posted: 17 May 2022 at 8:14pm

Door tags.
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